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Reactivity of rice husk ash

James, Jose and Rao, M Subba (1986) Reactivity of rice husk ash. In: Cement and Concrete Research, 16 (3). pp. 296-302.

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Abstract

Effect of lime:silica ratio on the kinetics of the reaction of silica with saturated lime has been investigated. Below C/S=0.65 the reaction does not proceed to completion and even in the presence of a large excess of silica only 90% lime is consumed. A parameter, lime reactivity index, has been defined to quantity the reactive silica present in rice husk ash. The product of the reaction between rice husk ash and saturated lime is a calcium hydrosilicate, C---S---H(I)**. The fibrilar structure and the hollow tubular morphology of the fibres of C---S---H, have been explained by a growth mechanism, where the driving force is osmotic pressure.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 27 Jan 2010 10:49
Last Modified: 19 Sep 2010 05:40
URI: http://eprints.iisc.ernet.in/id/eprint/22107

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